Twin-saw slabbing-machine.



` No. 7o7,|s4. Patented Aug. I9, |902. l Efe. THOMAS. TWIN SAW SLABBING MACHINE.

(Aliplication mea Apr. 7, 19o2.)

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mv Q l1 5f Y I 'm ba'fvmgs' No. 707,!84. Patented Aug. I9, |902.

E. LAITHoMAs. `TWIN SAW SLABBING MACHINE.

(Appucatiun med Apr. 7, 1902,)

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No. 707,134. Patented Aug. I9, |902.

` E. E. THOMAS.

TWIN SW SLABBING MACHINE.

(Application mea Apr. v, 1902.)

(No Model.) v 6 Sheets-Sheet 3.

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N N A Patented Aug. I9, |902.

ull l E. E. THOMAS.

TWIN SAW SLABBING MACHINE.

(Application led Apr. 7, 19053.)l

THE DRRIS PETERS CO OTO-l. TNO WAS @Y0 a C (No Model.)

No. 707,I84.

PatenfedAug. I9, |902. E. E. THoMAs. Twm sAw sLABma mAcHmE.

(Application mea Apr. v, 1902.)

(No Model.)

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No. 707,|84. Patented Aug I9, |902.

E. E. THOMAS.

TWIN SAW SLABBING MACHINE.`

(Application led Apr. 7, 1902.) (No Model.) 6 Sheets-Sheet 6.

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'y l carriageand lthe log-.dogs'fandf 4the j z5l theganglafterlslabbing;

OF MINNESOTA,`

y Beitknown than LRDWIN RKTROMAASL, of

St. Paul, Ramsey county, Minnesotamavein# y vented certain new and useful lIInprov'enIents 5 in Twin-Saw SlalobingLMachines, of which the following is a specification.

" el" ery; and vthe' primary object offthexinventionis to provide aslabbing-Inachine havinga Iomuch greater capacity thanany. of'` the mjay chinesof this character'fnow in use andorre-.- that is particularly adapted for slahbing small i *Iogsff ,y Y vA further object is torprovide a'lnachin'e I5" of simple but strong anddurabie construe- I Q-tion and one thatfcan be readily-handled by i `two' Inen, one to controlthe movement ofthe regulate the set Off'thesaws.

72o" A further object isto provide a vmachine in which'alog can be'rapidly 'giggedrrlback vfandagain carried ,p )astthe sawstorernove a e board or boards when the cant L is not'of the proper dimensions' to'lbesent directlyto The*inventionv consists; generally iny various constructions and combinations, all as :vhereinafterdescribed,-vandparticuvlarlypoint? ed outinthe clainns, A f 3o @In the'v aeeoxnpanying;l drawings, for'rn'ing I v part ofYV this speciii'cation, ,Figure 1- lisa plan f -iviewlof a log-slabloingfmachine embodying g d l my inventions..Figpzis aside 'elevationfot' the same. l Fig. 3 is an'endviewshowingthe ,A -35ypos'ition of `the saws with' respect to the carv rageguideway. 1j`ig.-4'is `a planviewiof the .i j saws and their Operating Inechanlsrn.v E Ig. 5 -f A, is a `longitudinal section of the forwardend Y I II1eclfiaIIisin` for operating the locking-dog, and v"the rear sawyera` valvea.. g. 8? is a? trans-v verse section showing the position of themov.-

. ablelog-dog and its st e'arn operatingfcylinderl My invention relates to'jsaw-Inill'niachin? other to` n I d v UnitedStatesffiled'by megAugust 31,1901, c

' Serial No. 73,314, and` neednot be 'described indetail" herein. `The opposite lendsgofy the Y steam feedcylinder arefconnected by pipes I UNITDQ STATES `DWIN n. TIIoIvIAsQonsIij PAUL, 'IIIINIvIrs'OTA, AssIGNoR. OFONE-QI-IALTO- y UNION .IRON WORKS, on MINNEAPOLIS, vIxIINNnsOrA,yaA` CORPORATION the mechanism for operatingfithe'valve that*` admits steaml to the cylinderythat controls the.'-

forward `portion of ,the mach-ine;` (Fig. ,Ilfis a'transversesection of the forward endjoflthe 10g-carriage and its support. J

berswhereon a steaxn-,feedcylinder Bof the usual type is supported upon suitable bases i t v or'feet This cylinderisjvprovided with ao hollow :piston7rod ofcommunvicating with a` hollowjpiston 6, that fisprovided withvh'oles 7,'1eadin g to the interiorof said cylinder, said' y holes being normal-lyclosed-*by check-valves v 65" responds to thatshowin and;l describedv in a y,

8. This construction 4of-piston and" rod'eor certain` application-for Letters Patent of the with sawye'rs valves lO ofthe usu'altype, havr v y The sawyersvalvesare jconnectedby a rod '13 anda similarr'od 14. connects "the forward' valve with one arinof lthe belllcrank l5,y 'Whoseoppositearrn isconnectedby a rod -16` i with a` sawyerslever17. i .The `forward tend# ofthe piston-rod 5 is iconnectedito a hanger- Casting'IS, that is boltedtoy the under sidelof Tahar l9`near its forward end",j-said bar being' ying'thesteam-inlet'pipesll'andexha'ustfpipes l' y12. i

provided, inits' o'ppositelongitudinal edges d with groove'sf20, that `,a're"adapted'to' receive .Y guide-barsl, that are :bolted tothe` upper ends oflorackets 22 and y23,supported. upon thel timbers 2. The brackets. `22far`e usedr near therearfof the machine and are rigid d orprovided with recesses 12ste receive'` the i feed-cylindenvwhile 'the brackets.,2afare,arfl 90 ranged near the -i'orward end of thefmachine and have U-shaped recesses 25,7;wherein;the` piston-,rod and. the` casting 18 reciprocates..

The'bearin'gl) is provided at intervals-with blocks 26,;upon which the log rests, and near its forward endl prov-'ide awxeddog 27, hav-v ing a series of teeth /`2S,xto.entefr theend of the log vas it is being fastened on the car-1 Hage-har. Tosecuretherear endof the log` on the carriage, I provide a movable dog 29, having a series of teeth and provided with longitudinal grooves 31, that are adapted to receive ribs 32, provided on guides 33, that are mounted on the bar 19 and travel therewith. The guides 33 have beveled inner faces 34, which aid in holding the log more securely to its seat on the carriage. Near the rear end of the bar 19 I provide a cylinder 35, having a piston 36, whose rod 37 is pivotally connected with the dog 20. The cylinder is provided with ports 3S and 39, communicatingI with the opposite ends, respectively, of the cylinder, and with a valve-casing 40, provided with a sliding piston-valve 41, that is adapted to alternately open and close said ports. A pipe 42 communicates with the interior of the casing and with the hollow piston-rod 5, being connected thereto at a point preferably near its connection with the hanger-casting 13. The casing 40 is also connected with an exhaust-pipe 43, that is adapted to slide iu a bearing-'11, provided in the end of pipe 4:5, thatis supported by any suitable means, such as one-ot' the brackets 22 at the rear of the machine. The stem of the valve 4i is connected to one arm lof a bell-crank 4G, that is pivoted on the carriagebar, and the opposite arm of said bell-crank is connected bya link-17 with an arm 48, that has a key-seat or is splined on a rod 49, that is supported at its opposite ends in bearings on the brackets 22 and 23, and is further supported by sliding arms 52, that are bolted to the bar 19 and between which the arm 48 is arranged. I prefer to provide a short section of pipe 53 on the rod 49 between one of the arms 52 and the arm flb to prevent the latter from slipping out of its proper position or becoming cramped on the rod. As the carriage-bar is driven forward or back the arm 4S, sliding on the rod 49, will permit the operator by rocking said rod to operate the valve 4l at any stage of the stroke of the carriage.

The forward end of the rod 49 is provided with a depending arm 54, by the movement of which said rod is rocked, and the lower end of said arm is connected by a rod 55 with the lower end of a lever 56, that is pivoted ona standard 57. The operation of this lever will serve to rock the rod 49 in its bearings, move the valve 41, and admit steam to the cylinder 35 to actuate the piston 3G to drive the Inovable dog into the end ot' the log or withdraw it therefrom, according to the direction-in which said lever is moved.

It is evident that by means ofthe mechanism heretofore described a log having been rolled onto the carriage can be almost instantly dogged or locked thereon even while the carriage and log are moving toward the saws. The lever 5U is located near the sawyers lever 17, heretofore referred to, so that one man can control the movement of the sliding carriage-bar and also the mechanism for operating the movable dog.

The saws which I employ in this machine are of the circular type, (represented by reference-iigure 58,) the arbors 50 ot' said saws being mounted in suitable bearingson frames 61 and provided with driven pulleys 62. The frames 61 rest within recesses 63, provided on bases 64, that are supported upon timbers G5, and bars 66, secured `to said bases, overlap the edges of said frames and hold them in position while permitting a longitudinal sliding movement thereof, which permits the saws to be adjusted toward or from each other, accordingto the size ot' the log or the slabs to be removed.

Any suitable mechanism may be employed for adjusting the saws; but I prefer to provide a lever 67, pivoted on a casting 68 and movable over a quadrant G9. Said lever is provided with `the usual locking-latch device 70 and is connected above its pivot by an adjustable coupling 7l with the lower end of a pivoted bar 72, whose upper end is connected by a link 73 with lugs 74- on the saw-frame adjacent to the lever G7. The opposite saw-frame is provided with similar lugs and a link connected with a bar 75, which in turn is connected by a rod 76 with an extension 77, provided at the lower end of the lever 67. Movement of the lever 67 back and forth over the quadrant will move the saws toward or from each other and enable the setter to remove any desired thickness of slab from the log. Each saw is provided with the usual guide 73.

IOO

Upon the opposite side of the saws from the steam feed cylinder I provide timbers 79, forming a continuation substantially of the timbers 2 and supporting `brackets 30, corresponding to the brackets 23, except that the upper ends thereof are provided with downwardly-inclined faces, whereon the carriagebar guides 8l are secured. These guides being on an incline with respect' to the carriagebar offer no obstruction to the slabs as they fall from the log on each side, but rather aid in guiding them to their proper position upon the conveyers arranged to receive them. The inner edges of the guides are substantially horizontal and adapted to enter the grooves in the carriage-bar as it is projected past the saws, the ends of said grooves being of sufficient width to receive the tapered ends of the guides to prevent any possibility of'the sliding bar not engaging the guides after passing the saws.

The operation of the machine is briefly as follows: A log having been rolled from` the deck upon u the carriage the Sawyer moving the lever 56 operates the movable dog and quickly clamps the endsl of the log regardless of the position of the carriage with respect to the feed -cylinder, provided, ot' course, it is withdrawn from between the saws. The saw- .yers valves are then operated and the carriage set in motion, projecting the log between. the saws, which have previously been set the proper distance apart, to remove a slab from each side of the log. When in this con- IIO IZO

from `the saws the Sawyer will not only have' absolutecontrol over-the carriage and be ableto arrest its movement at any point or drive it forward, but he will also control the mov-A able dog and can release or redog the logwhenever-desired. The'machine` will be sor dition, the log is known as a cant, and nnless it is desired to lremoveaslabs from the other sides and reduce the log to atimber it vis discharged from thecarriage after passing once through the saws and 'conveyed to another partof vthe Imill, usually tothe gang. During the movement of the log towardor constructed that logs varying considerably in length 'may be secured on the carriage,l 'the sliding dog and piston connected therewith adapting themselves -intheir throw or lmovejinent to the variousl lengths of logs'to be in connection with my 'machine ;.butl dotnet slabbed. This method of. securing ythe logs on the-carriage and slabbing them is so much faster than the `same operation can be per# formed by other machines of this kind in gen-v eral use that it is particularly adaptedfor slabbing small logs, in the handlingof which by the usual machines considerable time and labor are consumed owing to the factthata' larger number are usually handled in a given `time and secured on the carriage even more firmly than the larger logs. v

It sometimes happens after removingl the slabs from a log that the .cant is too large to be sent directly to the gang-saws, and in such f .case it is necessary or desirable to gig the logg back and remove oneor more boards. Thisl can hardly be done in the machines now 'in use owing to their constructionand comparatively slow movement;'but with the rapidly-l reciprocating bar which Iemploy the log can` be driven past thev saws and slabbed and then rapidly gigged back and lagain driven forward to remove the boards'.A

Ihave shown twincircular-saws employed wish to confine myselftothisstyle,as'those of theband or up-and-down reciprocating type may be employedif preferred.

I claim as my invention- Y l. The combination, withaIsteam-feed cyl- Y inder and its piston, of a sliding log-carriage the movement of said piston, and twin circur' lar saws between which '.s'aid carri-age and the connected with said piston, said carriage be` ing adaptedtoy accommodate a' single log y thereon, guides for said carriage, fixed andr .movable dogs provided on said carriage,

power means within control ofthe Sawyer at a ixed'pointfor operating the'movable dog at any point in the stroke'or travel of said carriage, a lever and valves for' controlling log thereon are described. l

2; The combination, with a steam-feed cylprojected, substantially 'as ,yinder, itspiston and the valves -for controlling the admission of steamto the same, of'a longitudinally sliding 'bar connected with said piston, a iixed and a'movable` dogpro# vided on said bar between which thelog to be slabbed is placed, an `engine located on said' bar and having its piston 'connected with's'aidy vmovable dog, power means Within controlof' 7o the Sawyer at a fixed point for regulating thel 'admission of steam to said enginefhand the movementof -said movable d'og at any p'oint in theV travel of said bar, and twin Vcircular i saws between whichsaid barand thelog there- 1 75 on are advanced toremovethefslabs.'

' .3. The combination, with a steam-feed cylinder, its piston and the valves for control-f lingthe admissionof steam thereto, of a'slid-i ing bar. connected with saidpistonland'driven' 8o lating'the admission f'steamV thereto, andal 9o levermechanism within control of the sawyer v for rockingl said `rod and operating saidegine-valve to operate said movable dog at anyl pointinthe travel of said bar.

. 4;? The'combination, with a steam-feed-cyl-f inder, its piston` and the sawyers valves'for controlling the admission'of ysteam thereto,- of l v a longitudinally-movable carriage, ii'ced and movable dogs providedthereo'n and betweenA which the ends of the 'log are'clampe'd, a iiuidf` 10o pressuremotor 'device providedon said car-"` riageandconnected with said movable dog, andpower means Within-control'of the saw' yer ata fixed point for regulating the admission of pressure to saidmoto'r device and con- IvIo5 trolling the movement of said dog at any-point in the travel of said carriage.

5f The combination', witha stea`n'n''feedc'yl--v` vinder and its piston having a'holl'ow piston-A rod, ofa carriage connected with'said rod, a@ clamping mechanism, an engine having suit-Y able connections with said hollow rod -to re-f ceive'steampressure therefrom, the piston of said engine'being connectedto said clam ping l mechanism, means. connected with theval've A, x I 5 ofvsaid'engineand'withinncontrol ofthe sawyer at a fixed point for regulating the admis-` 'y sion of steam to said engine-cylinder and con-4 trolling the movement of said clamping mecli-` anism at-any point in'thetra'vel of said car-izo riage', and a sawyers lever and valves'fo'r'said feed-cylinder. Y y

6. Thel combinatiom with the steam-feed cylinder, having suitable valves and a'hollow f piston and rod', of a sliding 4carriageH-bar con- 125 nectedl to said rod, a fixed and la movable-dog.

provid-ed onsaid ba'r and between which the log tobeslabbed isclamped, anengine providedon said bar and having its piston' connected with said movable dog yfor operating thesame, a pipe 'connecting said hollow pis! ton-rod with said engine,arocking rod provided upon stationary supports near said bar,

an arm ,splined thereon-and connected with the valve of said engine io control the admission of steam thereto from said hollow pistonrod, suitable lever mechanisms within control of the Sawyer for operating the valves of said feed-cylinder and for rocking said rod to control the movement of said movable dog, and twin saws provided near the forward end of said bar and between which it is driven with the log, substantially as described.

7. The combination, with a steam-feed cylinder having suitable valves, a piston and a hollow piston-rod, of a carriage whereon the log to be slabbed is placed, saws provided near the forward end of said carriage, means for moving said saws toward or from each other to change their set, means for clamping the log upon said bar to prevent movement of the same during the slabbing operation, power means provided on said carriage for controlling the clamping operation of said clamping means, and means within control of the sawyer at a fixed point for actuating said controlling means to operate the clamp connected therewith at any point during the movement of said carriage.

S. The combination, with a steam-feed cylinder, its piston and the sawyer valves, of a carriage, a clamping mechanism thereon, a fluid-pressure device provided on said carriage and connected with said clamping mechism, and power means within control of the sawyer at a fixed point for regulating the admission of pressure to said motor device and controlling the movement of said clamping mechanism at any point in the travel of said carriage.

9. The combination,with a suitable base, of a steam-feed cylinder supported thereon and provided with valves for controlling the admission of steam thereto and a lever mechanism for operatingr said valves, of twin circular saws provided near one end of said cylinder, a longitudinally-slidable bar provided above said feed-cylinder, guides for said bar upon opposite sides of the saws, brackets whereon said guides are supported, a iixed and a movable dog provided on said bar and adapted to clamp the ends of the log placed between them, an engine mounted on said bar and having its piston connected with said movable dog, a rocking rod supported on said brackets near said bar, a sliding arm splined on said rod and connected with the valves of said engine, and a lever mechanism provided near the lever for operating said feed-cylinder-valves and connected with said rocking rod for operating the same to actuate said movable dog at any point during the travel of said bar.

10. The combi nation,with a steam-feed cylinder provided with a hollow piston and rod and valves for controlling the admission of steam thereto, of a sliding bar provided above said feed-cylinder, suitable guides between which said bar is slidable, twin circular saws provided opposite the forward end of said bar, a fixed dog provided on said bar and having a sliding dog also mounted on said bar, guides between which said sliding dog is movable parallel to the direction of movement of said bar, an engine mounted on said bar and connected with said hollow piston-rod to receive steam therefrom, the piston of said engine being attached to said movable dog, a lever mechanism within control of an attendant for operating said feed-cylinder valves and for regulating the admission of steam to said engine at any point during the travel of said bar.

In witness whereof I have hereunto set my hand this ith day of April, 1902.

EDWIN E. THOMAS.

In presence of- RICHARD PAUL, M. C. NooNAN. 

